Spear gun with an adjustable grip

ABSTRACT

A spear gun for scuba diving that comprises a frame with a body elongated generally in a direction of a longitudinal axis of the gun and a grip at one end of and extending from the elongated body. The grip includes a fixed part attached to and integrally with the body and a movable part adjustably mounted to the fixed part. Also provided is a device for securing the movable part to the fixed part when a desired configuration of the grip has been achieved.

FIELD OF THE INVENTION

The present invention relates generally to underwater activities and, more particularly, to spear guns for use in fishing and underwater hunting.

BACKGROUND OF THE INVENTION

Conventional spear guns, such as those utilized in scuba diving, typically comprise a frame having a grip and an elongated body extending from the grip, a spear being slidingly engaged on and with the body. Upon loading the gun, elastic cables under tensile stress exert a propulsion force on the spear. The spear is then released and launched toward the intended prey by pulling a trigger situated immediately in front of the grip.

For optimal use of a fishing gun for scuba divers, it is important for the grip to enable the scuba diver to hold it safely and steadily with only one hand. For this purpose, the shape and size of the grip are particularly important and should ideally be adaptable to the shape and size of the user's hand, also on account of the fact that the scuba diver is likely to be wearing gloves of a more or less considerable thickness.

In the majority of cases, fishing guns for scuba divers are fitted with a fixed grip that is sized on the basis of average hand measurements so as to satisfy a large number of users. Fishing guns for scuba divers have also been made with a replaceable grip so that users can have the gun fitted with the grip that best suits their needs when they buy it, or the gun may be sold complete with several interchangeable grips for use in different operating conditions, e.g. with and without gloves. Such solutions naturally result in a greater structural complexity and pose problems in that they make it necessary to stock the various sizes of grip.

OBJECTS AND SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a spear gun for scuba divers with a grip that may be readily adjusted according to the user's needs.

Another object of the invention is to provide a fishing gun for scuba divers of the aforementioned type wherein the grip is adjustable in a particularly straightforward manner from the structural and functional viewpoint.

According to one aspect of the present invention, a spear gun for scuba divers is provided, the gun comprising a grip having at least two parts, one of which is secured to the frame of the gun while the other is movably mounted to a part of the gun that is secured to the frame, and a connector between the secured part and the movable part for adjusting the parts relative to one another.

BRIEF DESCRIPTION OF THE DRAWINGS

A specific, illustrative locking device, according to the present invention, is described below with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of a frame for a spear gun fit with a grip, according to one aspect of the present invention;

FIG. 2 is a side view of the frame illustrated in FIG. 1 showing two parts of the grip, according to the present invention;

FIG. 3 is an exploded view of the grip portion of the frame shown in FIG. 1;

FIG. 4 shows a first adjustment mode for positioning of a movable part relative to a fixed part of the grip shown in FIG. 1, according to the present invention;

FIG. 5 shows a second adjustment mode for the movable part relative to the fixed part of the grip illustrated in FIG. 4; and

FIG. 6 shows a third mode of adjustment for the movable part in relation to the fixed part of the grip set forth in FIG. 4.

Still other objects and advantages of the present invention will become apparent from the following description of the preferred embodiments.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawings and, more particularly, to FIGS. 1-6, there is shown generally a specific, illustrative spear gun for scuba diving, according to various aspects of the present invention. In one embodiment, illustrated in FIG. 1, the gun includes a frame 1 with an elongated body 2 extending substantially along a longitudinal axis X of the gun, the body being selectively configured so as to engage a stem for supporting and guiding a spear (not shown). The body preferably terminates at a closed trigger guard 4 which extends along the body to form a space 5 for a trigger (not shown).

The grip 3 consists of a fixed part 3 a integrally attached to and extending from the elongated body 2, and a movable part 3 b connected to the rear of the fixed part. More precisely, the fixed part comprises a front 7, anatomically shaped to make it easy to grasp the grip with the fingers, and with a central rib 6 extending over its entire length on the opposite side. The movable part 3 b has an outer profile shaped so that the user can comfortably rest the palm of his/her hand and a substantially U-shaped cross-section, shown in FIG. 3, suitable for engaging on the central rib 6.

At each end of the rib 6 there are respective longitudinal through slots 8, which may be elliptic in shape, as in the embodiment illustrated, while there are two corresponding through holes 9 on the movable part 3 b that, when the rib 6 is engaged in the movable part 3 b, these holes 9 are aligned with the slots 8. A pair of bolts 10 and nuts 11 for engaging in the holes 9 through the slots 8 are used to secure the movable part 3 b to the fixed part 3 a.

Loosening one or both of the bolts 10 enables the displacement of the movable part 3 b with respect to the fixed part 3 a to adjust the position of the former as required, then the one or both bolts 10 are tightened again to lock the movable part 3 b of the grip in the chosen position. FIGS. 4, 5 and 6 show three different positions in which the movable part 3 b can be placed with respect to the fixed part 3 a.

FIG. 4 shows a first case wherein the movable part 3 b is shown abutting completely against the rib 6 of the fixed part 3 a, thus achieving the configuration with the narrowest grip achievable. FIG. 5, on the other hand, shows the configuration with the widest grip achievable, when the movable part 3 b only partially engages on the rib 6 of the fixed part 3 a. In the two configurations illustrated in FIGS. 4 and 5, the variation in the width of the grip 3 is obtained by displacing the movable part 3 b closer to or further from, but always parallel to the fixed part 3 a, but a differentiated variation in the width of the grip can also be obtained by turning the movable part 3 b around one or other of the two bolts 10. For example, by rotating the movable part 3 b around the bolt nearest to the longitudinal axis of the gun, as shown in FIG. 6, the width of the grip is progressively reduced starting from its free end, at which it reaches its maximum width.

Although it is not shown in detail, it is clear that the situation opposite to the one shown in FIG. 6 can be obtained by turning the movable part 3 b around the bolt 10 situated in the vicinity of the free end of the grip 3, thereby obtaining a widening of the grip in the vicinity of its root while maintaining the minimum width in the vicinity of its free end. It is also self-evident, and consequently not illustrated here in detail, that different grip configurations can be obtained by combining the rotation and lateral displacement of the movable part 3 b in various ways.

It should be noted that the rotation of the movable part 3 b with respect to the fixed part 3 a is enabled by the slack existing between the two parts, and particularly by the fact that the movable part 3 b is slightly shorter than the central rib 6 on the fixed part 3 a on which the movable part 3 b engages.

The thickness of the fixed part 3 a and of the movable part 3 b in line with their adjoining edges is designed to ensure a smooth and substantially continuous surface on the grip.

Various modifications and alterations to the present invention may be appreciated based on a review of this disclosure. These changes and additions are intended to be within the scope and spirit of the invention as defined by the following claims. 

1. A spear gun comprising a frame with a body that is generally elongated along a longitudinal axis of the gun and a grip at one end of and extending from the elongated body, wherein the grip includes a fixed part attached to and integrally with elongated body and a movable part adjustably mounted on the fixed part, with a device for locking the movable part relative to the fixed part when a desired configuration of the grip has been achieved.
 2. The spear gun set forth in claim 1, wherein the fixed part has a central rib along a side facing in a direction opposite to that in which the elongated body extends, the movable part having a substantially U-shaped cross-section for engagement with the rib.
 3. The spear gun set forth in claim 2, wherein longitudinal slots are formed in the rib with corresponding through holes on the movable part suitable for engaging bolts for locking the movable part on the fixed part.
 4. The spear gun set forth in claim 3, wherein the movable part is displaceable generally equidistant from the fixed part or angularly displaceable about either of the locking bolts, a degree of slack being provided between the fixed part and the movable part in a selected direction along the length of the grip. 